Poor customer service e-commerce

Ordered a TV online and paid. After money was accepted for the order, 2 day later I received an email that that tv was out of stock and will take 7-15 working days to refund me. I asked if I could select another TV, but would need to pay on the differecne. Inwss annoyed and said ok, but then i need to able to collect tosay. I chose and paid the extra and have been advised I now need to wait for funds to clear before I can collect. The error was on their end and now I am being inconvenienced. I find this unacceptable.